Toothbrush refill



FIG. 1 is a perspective view as seen from the front and left side of a toothbrush refill showing our new design;

FIG. 2 is a left side view of the toothbrush refill of FIG. 1;

FIG. 3 is a right side view of the toothbrush refill of FIG. 1;

FIG. 4 is a front view of the toothbrush refill of FIG. 1;

FIG. 5 is back view of the toothbrush refill of FIG. 1;

FIG. 6 is an enlarged top view of the toothbrush refill of FIG. 1; and,

FIG. 7 is an enlarged bottom view of the toothbrush refill of FIG. 1.

The broken lines illustrate portions of the toothbrush refill that form no part of the claimed design. 

The ornamental design for a toothbrush refill, as shown and described. 